<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 提示区域 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
      <!-- 步骤条 -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab栏 -->
      <el-form :model="addForm" :rules="addFormrules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs v-model="activeIndex" :tab-position="'left'" style="min-height: 200px;" :before-leave="beforTabLeave"
        @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight" type="number">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number" type="number">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader v-model="addForm.goods_cat" :options="catelist" :props="cateProps" @change="handleChange">
              </el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="(item,index) in manyTableData" :key="item.attr_id">
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="(item,index) in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action图片上传到后台的地址 -->
            <el-upload :action="uploadURL" :on-preview="handlePreview"
              :on-remove="handleRemove" list-type="picture" :headers="headerObj" :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
              <!-- <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div> -->
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品的按钮 -->
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="this.previewPath" class="previewImg">
    </el-dialog>
  </div>
</template>
<script type="text/ecmascript-6">
import _ from 'lodash'
export default {
  name:'Add', 
  data() {
    return {
      activeIndex:'0',
      //添加商品的表单数据对象
      addForm:{
        goods_name:'',
        goods_price:0,
        goods_weight:0,
        goods_number:0,
        //商品所属的分类数组
        goods_cat:[],
        //上传图片的临时路径
        pics:[],
        //商品介绍
        goods_introduce:'',
        //商品的动态参数，静态属性
        attrs:[]
      },
      addFormrules:{
        goods_name:[
          { required: true, message: '请输入商品名称', trigger: 'blur' },
        ],
        goods_price:[
          { required: true, message: '请输入商品价格', trigger: 'blur' },
        ],
        goods_weight:[
          { required: true, message: '请输入商品重量', trigger: 'blur' },
        ],
        goods_number:[
          { required: true, message: '请输入商品数量', trigger: 'blur' },
        ],
        goods_cat:[
          { required: true, message: '请输入商品分类', trigger: 'blur' },
        ],
      },
      //商品分类数据
      catelist:[],
      //级联选择框器配置项
      cateProps:{
        expandTrigger: 'hover',
        label:'cat_name',
        value:'cat_id',
        children:'children'
      },
      //动态参数列表
      manyTableData:[],
      //静态属性列表数据
      onlyTableData:[],
      //上传图片url地址
      uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
      //上传组件请求头
      headerObj:{
        Authorization:window.sessionStorage.getItem("token")
      },
      previewPath:"",
      //显示图片预览对话框
      previewVisible:false
    }
},
  components:{},
  computed:{
    cateId(){
      if(this.addForm.goods_cat.length === 3){
        return this.addForm.goods_cat[2]
      }else{
        return null
      }
    }
  },
  created(){
    this.getCateList()
  },
  methods:{
    //获取所有商品分类数据
    async getCateList(){
      const {data:res} = await this.$http.get("categories")
      if(res.meta.status !== 200){
        return this.$message.error("获取商品分类数据失败！")
      }
      this.catelist = res.data
      console.log(this.catelist)
    },
    //级联选择框改变事件
    handleChange(){
      if(this.addForm.goods_cat.length !== 3){
        this.addForm.goods_cat = []
      }
      console.log(this.addForm.goods_cat)
    },
    //tab标签的钩子函数
    beforTabLeave(activeName,oldActiveName){
      if(oldActiveName === '0' && this.addForm.goods_cat.length !== 3){
        this.$message.error("请选择商品三级分类！")
        return false
      }
    },
    //tab标签点击事件
    async tabClicked(){
      if(this.activeIndex === '1'){
        const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
          params:{sel:"many"}
        })
        if(res.meta.status !== 200){
          return this.$message.error("获取动态参数列表失败")
        }
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0?[]:item.attr_vals.split(" ")
        });
        this.manyTableData = res.data
        console.log(this.manyTableData)
      }else if(this.activeIndex === '2'){
        const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
          params:{sel:"only"}
        })
        if(res.meta.status !== 200){
          return this.$message.error("获取静态属性失败")
        }
        this.onlyTableData = res.data
        console.log(res.data)
      }
    },
    //预览图片
    handlePreview(file){
      //保存图片的真实路径
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    //删除图片
    handleRemove(file){//1.获取删除的临时路径，在提交表单的图片数组找到对应的索引。将它从数组删除
      console.log(file)
      //拿到删除图片的临时路径
      const filepath = file.response.data.tmp_path
      //findIndex 找到返回索引，找不到返回-1
      const i = this.addForm.pics.findIndex((x)=>x.pic === filepath)
      this.addForm.pics.splice(i,1)
      console.log(this.addForm)
    },
    //监听图片上传成功的事件
    handleSuccess(res){//1.将图片传给后端，后端返回临时路径，然后将他保存在表单，最后和表单一起上传 
      console.log(res)
      const picInfo = {
        pic:res.data.tmp_path
      }
      this.addForm.pics.push(picInfo)
      console.log(this.addForm)
    },
    //添加商品
    add(){
      this.$refs.addFormRef.validate(async (valid)=>{
        if(!valid){
          return this.$message.error("请填写必要的表单项！")
        }
        //goods_cats深复制，级联选择要求数组，后台要求字符串 
       const form = _.cloneDeep(this.addForm)
       form.goods_cat = form.goods_cat.join(',')
       //处理动态参数和静态属性
       this.manyTableData.forEach((item)=>{
         const newInfo = {
           attr_id:item.attr_id,
           attr_val:item.attr_vals.join(' ')
         }
         this.addForm.attrs.push(newInfo)
       })
       this.onlyTableData.forEach((item)=>{
         const newInfo = {
           attr_id:item.attr_id,
           attr_val:item.attr_vals
         }
         this.addForm.attrs.push(newInfo)
       })
       form.attrs = this.addForm.attrs
       console.log('商品参数')
       console.log(form)
       //商品名称，必须是唯一的
       const {data:res} = await this.$http.post("goods",form)
       if(res.meta.status !== 201){
         return this.$message.error("添加商品失败！")
       }
       this.$message.success("添加商品成功！")
       this.$router.push("/goods")
      })
    }
  }
}
</script>
<style lang="scss" scoped>
.el-steps{
  margin: 15px 0;
}
.el-checkbox{
  margin: 0 10px 0 0 !important;
}
.previewImg{
  width: 100%;
}
.btnAdd{
  margin-top: 15px;
}

</style>
<style scoped>
.el-steps >>>.el-step__title{
  font-size: 13px;
}
.quill-editor >>>.ql-editor{
  min-height: 300px;
}
</style>